Bug ID 846217: Translucent vlan-groups set local bit in destination MAC address

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP TMOS(all modules)

Known Affected Versions:,,,,,,,, 14.1.3,, 14.1.4,,,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2

Fixed In:

Opened: Nov 05, 2019

Severity: 2-Critical


Translucent vlan-groups may set the locally-unique bit in a destination MAC address when sending traffic to a pool member/client.


Traffic handled by translucent vlan-groups may not work properly.


On versions earlier than 15.0.0: - Translucent vlan-group is in use. On v15.0.0 and later: -- Translucent vlan-group is in use. -- The connection.vgl2transparent db variable is enabled.


On versions earlier than 15.0.0, there is no workaround. -- On version 15.0.0 and later, you can disable the connection.vgl2transparent db variable to mitigate the problem: tmsh modify sys db connection.vgl2transparent value disable Note: connection.vgl2transparent is disabled by default.

Fix Information


Behavior Change

Guides & references

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